diff --git a/tools/help.sh b/tools/help.sh
index 16d4d22..87ca209 100644
--- a/tools/help.sh
+++ b/tools/help.sh
@@ -2,29 +2,37 @@
 
 set -e
 
-# 复制Nginx、服务配置配置
-sudo cp -r ./tools/centos/* /
+GREEN='\033[0;32m'
+BLUE='\033[0;34m'
+YELLOW='\033[0;33m'
 
-# 复制后端服务到运行目录
-sudo rm -rf /data/wwwroot/server
-sudo cp -r ./server /data/wwwroot/
+# shellcheck disable=SC2039
+echo -e "${BLUE}一些常用的命令脚本：${NC}"
 
-# 创建游戏引擎服务端运行目录
-if [ ! -d "/data/wwwroot/game" ]; then
-    mkdir -p /data/wwwroot/game
-fi
+echo -e "${GREEN}查看所有服务状态${NC}"
+# shellcheck disable=SC2039
+echo -e "${GREEN}sudo systemctl status server.service game.service${NC}"
 
-# 编译后端服务
-cd /data/wwwroot/server/
-/usr/local/go/bin/go env -w GOSUMDB=off
-export GO111MODULE=on && export GOPROXY=https://goproxy.io && /usr/local/go/bin/go build main.go
+# shellcheck disable=SC2039
+echo -e "${GREEN}重启后端服务${NC}"
+# shellcheck disable=SC2039
+echo -e "${GREEN}sudo systemctl restart server.service${NC}"
+# shellcheck disable=SC2039
+echo -e "${GREEN}重启游戏服务器${NC}"
+# shellcheck disable=SC2039
+echo -e "${GREEN}sudo systemctl restart game.service${NC}"
 
-# 重启Nginx服务
-sudo systemctl restart nginx.service
+# shellcheck disable=SC2039
+echo -e "${GREEN}监听后端服务实时日志${NC}"
+# shellcheck disable=SC2039
+echo -e "${GREEN}sudo journalctl -fu server.service${NC}"
+# shellcheck disable=SC2039
+echo -e "${GREEN}监听游戏服务器实时日志${NC}"
+# shellcheck disable=SC2039
+echo -e "${GREEN}sudo journalctl -fu game.service${NC}"
+# shellcheck disable=SC2039
 
-# 重启后端服务和游戏服务
-sudo systemctl daemon-reload
-sudo systemctl enable server.service
-sudo systemctl restart server.service
-sudo systemctl enable game.service
-sudo systemctl restart game.service
\ No newline at end of file
+echo -e "${GREEN}重启Nginx服务${NC}"
+# shellcheck disable=SC2039
+echo -e "${GREEN}sudo systemctl restart nginx.service${NC}"
+# shellcheck disable=SC2039
\ No newline at end of file
diff --git a/tools/init.sh b/tools/init.sh
index 87ca209..16d4d22 100755
--- a/tools/init.sh
+++ b/tools/init.sh
@@ -2,37 +2,29 @@
 
 set -e
 
-GREEN='\033[0;32m'
-BLUE='\033[0;34m'
-YELLOW='\033[0;33m'
+# 复制Nginx、服务配置配置
+sudo cp -r ./tools/centos/* /
 
-# shellcheck disable=SC2039
-echo -e "${BLUE}一些常用的命令脚本：${NC}"
+# 复制后端服务到运行目录
+sudo rm -rf /data/wwwroot/server
+sudo cp -r ./server /data/wwwroot/
 
-echo -e "${GREEN}查看所有服务状态${NC}"
-# shellcheck disable=SC2039
-echo -e "${GREEN}sudo systemctl status server.service game.service${NC}"
+# 创建游戏引擎服务端运行目录
+if [ ! -d "/data/wwwroot/game" ]; then
+    mkdir -p /data/wwwroot/game
+fi
 
-# shellcheck disable=SC2039
-echo -e "${GREEN}重启后端服务${NC}"
-# shellcheck disable=SC2039
-echo -e "${GREEN}sudo systemctl restart server.service${NC}"
-# shellcheck disable=SC2039
-echo -e "${GREEN}重启游戏服务器${NC}"
-# shellcheck disable=SC2039
-echo -e "${GREEN}sudo systemctl restart game.service${NC}"
+# 编译后端服务
+cd /data/wwwroot/server/
+/usr/local/go/bin/go env -w GOSUMDB=off
+export GO111MODULE=on && export GOPROXY=https://goproxy.io && /usr/local/go/bin/go build main.go
 
-# shellcheck disable=SC2039
-echo -e "${GREEN}监听后端服务实时日志${NC}"
-# shellcheck disable=SC2039
-echo -e "${GREEN}sudo journalctl -fu server.service${NC}"
-# shellcheck disable=SC2039
-echo -e "${GREEN}监听游戏服务器实时日志${NC}"
-# shellcheck disable=SC2039
-echo -e "${GREEN}sudo journalctl -fu game.service${NC}"
-# shellcheck disable=SC2039
+# 重启Nginx服务
+sudo systemctl restart nginx.service
 
-echo -e "${GREEN}重启Nginx服务${NC}"
-# shellcheck disable=SC2039
-echo -e "${GREEN}sudo systemctl restart nginx.service${NC}"
-# shellcheck disable=SC2039
\ No newline at end of file
+# 重启后端服务和游戏服务
+sudo systemctl daemon-reload
+sudo systemctl enable server.service
+sudo systemctl restart server.service
+sudo systemctl enable game.service
+sudo systemctl restart game.service
\ No newline at end of file
diff --git a/wiki/course/0002.md b/wiki/course/0002.md
index f2a3243..d017321 100644
--- a/wiki/course/0002.md
+++ b/wiki/course/0002.md
@@ -1,158 +1,3 @@
-## 第一课
+## 第二课
 
-> 第一课时操作引导文档。
-
-### 一、游戏资源下载
-
-> 1、访问：[GitHub](https://www.github.com)
-
-> 2、下载安装Git：[Git](https://git-scm.com)
-
-````shell
-# 生成GitHub SSH KEY
-ssh-keygen -t rsa -C "你的GitHub登录账号"
-````
-
-```shell
-git config -global user.name "你的GitHub用户名"
-git config -global user.email "你的GitHub登录账号"
-```
-
-````shell
-# 获取生成的GitHub SSH KEY
-C:\Users\admin/.ssh/id_rsa.pub
-````
-
-```shell
-# 下载游戏源码
-git clone --depth=1 git@github.com:makeryangcom/Engine2D.git
-```
-
-### 二、虚拟机的安装和配置
-
-> 1、CentOS系统镜像下载地址：[CentOS-8.5.2111-x86_64-dvd1.iso](https://mirrors.aliyun.com/centos/8/isos/x86_64/CentOS-8.5.2111-x86_64-dvd1.iso)
-
-> 2、切换到root用户，密码为`root`
-
-```shell
-su
-```
-
-> 3、修改SSH配置，防止后续SSH远程登录时因连接超时自动断开
-
-```shell
-vim /etc/ssh/sshd_config
-```
-
-> 4、获取虚拟机服务器内网IP地址
-
-```shell
-ifconfig
-```
-
-> 5、在本地电脑的命令行工具中通过SSH远程登录到虚拟机服务器
-
-```shell
-ssh root@服务器内网IP地址
-```
-
-> 6、更新软件源
-
-```shell
-sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
-sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
-# 设置阿里云软件源
-wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo
-# 清理缓存
-yum clean all
-yum makecache
-```
-
-> 7、游戏资源下载
-
-````shell
-# 安装git
-yum install -y git
-````
-
-````shell
-# 生成GitHub SSH KEY
-ssh-keygen -t rsa -C "你的GitHub登录账号"
-````
-
-````shell
-# 获取生成的GitHub SSH KEY
-cat /root/.ssh/id_rsa.pub
-````
-
-```shell
-git config --global user.name "你的GitHub用户名"
-git config --global user.email "你的GitHub登录账号"
-```
-
-```shell
-cd /opt
-# 下载游戏源码
-git clone --depth=1 git@github.com:makeryangcom/Engine2D.git
-```
-
-> 8、自动化部署
-
-```shell
-cd /opt/Engine2D
-sudo ./tools/init.sh
-```
-
-```shell
-# 取消CRYPTO_POLICY=的注释
-vim /etc/sysconfig/sshd
-# MySQL数据库远程连接配置
-vim /etc/ssh/sshd_config
-# 在最后添加下面的配置
-Ciphers aes128-ctr,aes192-ctr,aes256-ctr,3des-cbc
-KexAlgorithms diffie-hellman-group1-sha1
-# 重启服务
-sudo systemctl restart sshd
-```
-
-```shell
-cd /opt/Engine2D
-sudo ./tools/update.sh
-```
-
-> 9、本地解析服务器域名
-
-```shell
-C:\Windows\System32\drivers\etc
-```
-
-> 10、日常维护使用的命令
-
-``` bash
-# 监听后端服务日志
-sudo journalctl -fu server.service
-# 监听游戏服务器日志
-sudo journalctl -fu game.service
-
-# 常用维护命令-重启Nginx服务
-sudo systemctl restart nginx.service
-# 常用维护命令-停止Nginx服务
-sudo systemctl stop nginx.service
-# 常用维护命令-启动Nginx服务
-sudo systemctl start nginx.service
-
-# 查看后端服务、游戏服务器状态
-sudo systemctl status server.service game.service
-
-# 停止、重启后端服务
-sudo systemctl stop|restart server.service
-# 停止、重启游戏服务器
-sudo systemctl stop|restart game.service
-```
-
-> 11、其他配置
-
-```shell
-Host 0.0.0.0
-KexAlgorithms +diffie-hellman-group1-sha1
-```
\ No newline at end of file
+> 第一课时操作引导文档。
\ No newline at end of file